Well, mostly because Jazz asked me to post a complete list of the seasonals we are still missing in A1, and because my former list was incomplete.If it's a card that isn't released in US yet I will post the respective picture next to it, plus the name. Despite some of them containing A2 card borders, all of those are or will be available in A1 eventually.

Crest Proletariat Knight (A set 7 Crest card, that was not released in US. Instead we got Crest Ranger, which (as you can tell by the border) was an EX card)

Rusted Colossus

Glosfiea

Successor of the Shield / Halmira (Fierte's student and successor)(Valentine's, would be my guess)